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When X-Ray photons collide with electrons (a) They slow down (b) Their mass increases (c) Their wave length increases (d) Their energy decreases.
1 6729An electron emits energy (a) Because its in orbit (b) When it jumps from one energy level to another (c) Electrons are attracted towards the nucleus (d) The electrostatic force is insufficient to hold the electrons in orbits.
1 3361In a balanced chemical equation (a) Atoms are conserved (b) Molecules are conserved (c) Moles are conserved (d) Reactant and product molecules are preserved.
1 22629How many grams of NaOH will react with 0.2 equivalent of HCl? (a) 0.59 (b) 0.285 (c) 1.18 (d) none of these.
2 5983Which of the following is least acidic (a) Ortho-cresol (b) Para-cresol (c) Phenol (d) Meta-cresol.
1 4406In Reimer-Tiemann?s reaction, the reaction intermediate is (a) Carbene (b) Dichloro carbene (c) Carbonion (d) Carbonium ion.
1 11953A catalyst (a)always slows down the reaction (b)always starts a rection that would not have ocurred at all otherwise (c)causes changes in the rate of the reaction (d)changes the quantities of the products formed.
1 3689The rate of the first order reaction depends on the (a) Concentration of the reactant (b) Concentration of the product (c) Time (d) Temperature.
1 3372If the sum of n terms of two series of A.P are in the ratio 5n+4:9n+6 .find the ratio of their 13th terms?
1 5007If the letters of the word ?rachit? are arranged in all possible ways and these words are written out as in a dictionary, what is the rank of the word ?rachit?. (a) 485 (b) 480 (c) 478 (d) 481
8 39518
What is the interaction of Group A Streptococcus with HEp-2 & A549 cell line ?
How does facilitated diffusion present similarities with enzymatic chemical reactions?
what are the new agricultural techniques which can improve the production on agriculture?
To which structures do coeloms give birth?
Describe the aim of microarray data analysis?
Define kararch effect?
Which is the most stable sulphur at room temperature?
What kind of supervision do you like?
Why is it hard to keep genetically modified (GM) crops separate from non-GM crops throughout the manufacturing process?
Why are Plasmodiophoromycetes not true fungi?
What are teaspoons?
What are primary consumers? Can food chain present quaternary consumers without having secondary or tertiary consumers? Can a tertiary consumer of one chain be a primary or secondary consumer of another chain?
Bacteria are prokaryotic cells, i.e., They do not have membrane-delimited nucleus. Eukaryotes have cells with delimited nucleus. Where in these types of cells can dna are found?
what are arboreal animals?
Have the proteins of a family generally acquired distinctive properties within each of these three kingdoms for ancient families that arose before bacteria, archaea and eukaryotes diverged?
